Cellulosic dressing



Patented Jan. 31, 1950 UNITED STATES PATENT OFFICE CELLULOSIC DRESSINGNo Drawing. Application October 25, 1946, Serial No. 705,811. In FranceSeptember 14, 1945 Section 1, Public Law 690, August 8, 1946 Patentexpires September 14, 1965 4 Claims. (Cl. 28-72) The present inventionhas for its object to provide as a new article of manufacture an asepticand anti-septic cellulosic dressing or bandage, formed of a fabric thewarp and weft of which consist of very narrow strips (having a width ofa fraction of a millimetre) of regenerated cellulose.

In order to obtain a cellulosic bandage of the above type, a cellulosicfilm is first cut into very thin fiat strips or threads, preferablyhaving a width smaller than one millimetre, said threads beingthereafter reeled for use as an ordinary textile material in a weavingframe.

The above specified thread is then used in an ordinary weaving operationwith a warp and weft worked into a fabric so as finally to obtain a bandhaving a width as desired for the bandage.

In order to provide the greatest possible flexibility in the cellulosicthreads, the latter are coated with a suitable mineral oil (forinstance, ordinary petrol).

The woven band thus obtained is subjected to a calendering or rollingoperation, intended on the one hand to soften the fabric, and on theother hand to eliminate any asperities which could appear as a result ofan overturning during the weaving process, of some of the threads. Thecalendering temperature is desirably round about 90 C., the operationbeing carried out under a pressure of 2,000 kg, for a bandage having awidth of about ten centimetres.

In order that the bandage may present the required aseptic andgermicidal properties, there is used as initial material, a regeneratedcellulose having been impregnated (at a definite stage of itsmanufacture) with a suitable germicide.

According to a modification, the cellulosic bandage could be subjectedto an impregnating process prior to calendering for example.

The bandage thus obtained is then coiled to be delivered for sale.

The term petrol as used herein and in the claims is the equivalent ofthe term petrole specified in the corresponding French priorityapplication No. 502,788, filed September 14, 1945, now French Patent No.919,557 and corresponds to that portion of crude petroleum distillingbetween 150 C. and 300 C.

It will be obvious that the exemplary form of embodiment of the processas specified above is given merely in an indicative and not in arestrictive sense, and that said process may receive any modificationsin the details thereof without exceeding the scope of the invention.

What I claim is:

1. A process for manufacturing an aseptic bandage from regeneratedcellulose sheet material previously impregnated with a germicideproduct, comprising forming said sheet into a plurality of strips,weaving said strips into a fabric including a warp and a weft, treatingthe fabric thus produced with petrol and calendering the fabric thusproduced at a temperature of substantially C. and substantially onethousand pounds pressure per inch transverse linear dimension.

2. A process for manufacturing an aseptic bandage comprising forming asheet of regenerated cellulose sheet material, previously treated with agermicide into a plurality of narrow elongatedstrips, each having amaximum transverse dimension not exceeding about one twenty-fifth of aninch, reeling said strips on a reel, weaving said reeled strips as on aconventional weaving frame into a fabric having warp and weft whereby toproduce a bandage of desired width, treating said fabric with petrol andcalendering said fabric at a temperature of substantially 90 C., andunder a calendering pressure of substantially one thousand pounds perinch transverse linear dimension.

3. An aseptic bandage as obtained by the process set forth in claim 1.

4. An aseptic bandage as obtained by the process set forth in claim 2.

PIERRE J. GUERILLOT.

REFERENCES CITED The fol owing references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 302,073 Wheeler July 15, 18842,045,498 Stevenson June 23, 1936 2,063,218 Zisserman Dec. 8, 19362,106,457 Hyman Jan. 25, 1938 FOREIGN PATENTS Number Country Date 6,847Great Britain of 1915 511,166 Great Britain Nov. 3, 1937

1. A PROCESS FOR MANUFACTURING AN ASEPTIC BANDAGE FROM REGENERATEDCELLULOSE SHEET MATERIAL PREVIOUSLY IMPREGNATED WITH A GERMICIDEPRODUCT, COMPRISING FORMING SAID SHEET INTO A PLURALITY OF STRIPS,WEAVING SAID STRIPS INTO A FABRIC INCLUDING A WARP AND A WEFT, TREATINGTHE FABRIC THUS PRODUCED WITH PETROL AND CALENDERING THE FABRIC THUSPRODUCED AT A TEMPERATURE OF SUBSTANTIALLY 90*C. AND SUBSTANTIALLY ONETHOUSAND POUNDS PRESSURE PER INCH TRANSVERSE LINEAR DIMENSION.